Seiko Prospex Samurai SBDY131 (SBDY131). Current Prices, JDM Listings, Market Analysis
The Seiko Prospex Samurai SBDY131 is a JDM-market dive watch from Seiko's long-running Samurai line, distributed in Japan and tracked here for its cross-border pricing relevance. It appears with enough regularity on Japanese flea markets to make SBDY131 price monitoring worthwhile for buyers who want the watch at a fair number. The current US median sits at $466, which gives a useful anchor when evaluating what's active in Japan right now. Tonbo tracks this reference to flag when the gap between JP sourcing costs and US resale value creates a clear opportunity.
Current US Market Value
The US median for the Seiko Prospex Samurai SBDY131 SBDY131 is currently $466, with the interquartile range running from $458 to $474. That's a tight spread, which suggests price consistency at this level rather than wild variance, though it's worth noting the sample size here is only two verified comps. Two data points are enough to establish a directional baseline, but not enough to treat this median as highly stable. The comps are rated 🟢 Verified, meaning they come from confirmed sale data rather than ask prices, which makes them more reliable than listing-based estimates. As more transactions are recorded, confidence in this figure will improve. For now, $466 is a reasonable working number for SBDY131 for sale on the US secondary market.
Active JDM Listings
Japan is showing consistent supply of the SBDY131 right now, with multiple listings appearing on Yahoo Flea on May 30 across a range of conditions. Prices span from approximately ¥52,200 to ¥62,900, which at current exchange rates puts the sourcing cost meaningfully below the US median when factoring in typical import expenses. Condition ranges from lightly used to new-in-box, giving buyers options depending on their tolerance for wear. For those looking to buy SBDY131 Japan, this is an active window.
- ¥52,200 on Yahoo Flea, described as showing no noticeable scratches or stains
- ¥53,000 on Yahoo Flea, also described as no noticeable scratches or stains
- ¥57,000 on Yahoo Flea, listed as new
- ¥59,800 on Yahoo Flea, listed as new
- ¥62,500 on Yahoo Flea, described as close to unused
The cluster of listings on a single day suggests either a seller clearing inventory or natural market availability rather than a single distressed sale, which makes these prices more representative than an isolated data point would be.
Recent Alert History
No strict buy alerts or opportunity alerts have fired for the SBDY131 in the past 90 days. That absence doesn't mean the watch is overpriced or uninteresting. It means the JP listings that have appeared haven't crossed the threshold where the math becomes clearly favorable after accounting for shipping, fees, and the thin US comp base. Buyers watching this model should understand that alerts reflect a specific calculus around verified spread, not just whether a watch is available in Japan. The current activity is worth monitoring, but nothing in the recent data has triggered a signal. You can browse what's currently live across other tracked references at tonbomarket.com/signals.
Japan vs. US Price Gap
The SBDY131 price gap between Japan and the US exists partly because JDM Seiko Prospex models don't see wide retail distribution in North America, which keeps US supply thin and supports a modest premium for buyers who want the reference without sourcing it themselves. The Japan listings currently showing between ¥52,200 and ¥62,900 represent a potential spread against the $466 US median, but actual margin depends heavily on the yen rate at time of purchase, Yahoo Japan platform fees, shipping, and any import considerations. The primary risk here is the comp thinness on the US side. Two data points are a starting signal, not a definitive market. Before acting on a specific listing, it's worth checking whether new US comps have emerged. You can find deals that have cleared Tonbo's spread thresholds at tonbomarket.com/deals.
Get Real-Time Alerts for Seiko Prospex Samurai SBDY131
If you want to be notified the moment a Seiko Prospex Samurai SBDY131 SBDY131 listing crosses Tonbo's alert thresholds, paid plans at tonbomarket.com/pricing include real-time notifications for this reference and others tracked across the JDM market. If you're not ready for a paid plan, the free newsletter at tonbomarket.com covers notable JDM market movements on a regular cadence. The SBDY131 is on the watchlist. When the numbers line up, you'll know.